Lead pencil



A. POI-LAK v LEAD PENCIL Nov. 1s 1924;

Filed Sept. l5. 1923 iL-M6 a Patented Nov. 18, 1924.

n. Y., AssIGNoE 'ro SAMUEL KANNEE, or NEW YORK, N. kY.

ABRAHAM PQLLAK, or NEW YORK,

, i 1,515,615 PATENT OFFICE.

f LEAD PENCIL'.

Application mea september` 1s,v 192s. serial No. 652,376.

To all whom t may concern:

Be it known that "I, ABRAHAM PoLLAK,a citizen of the United States, and a resident of New York city, in the countyrofgNew York and State of New York, have invented certain new and useful Improvements f in Lead Pencils, of which the' following is a specification. y 5

' The invention relates to' improvements in mechanical lead pencils, and it vconsists in the ,novel features, structure and combinations of parts" hereinafterl described and particularly pointed out in the` claims, whereby a pencil of improvedcharacter is produced.

The present invention embodiesfcertain improvements on the lead pencil madek the subject of Letters `Patent No. 1,441,600, granted to me on January 9, 19,23, and No. 1,454,136, granted to'me' on May 8, 1923.

The object o f thepresent i'nventlon is to simplify the construction of the lead pencils disclosed in the yaforesaid Letters Patent and to `provide a `pencil whose interionmech` anism will be of durable character and reli` able in operation andv whose parts maybe conveniently assembled and, when necessary, disassembled. l

lead to vexposed position for writin K pur# poses, retracting or repelling the llea when the use thereof ,hasl yconcluded and finally,

an 1 undulyv short piece ,of `leadexpelling Y entirely from thepenciL* 'Thel invention will` be muy understood i, from the' detailed description hereinafter presented, reference being-had tothe "acf" companying drawings, in which: Fig, 1 is a central longitudinalfsectlon through a mechanical lead pencil embodying my invention; i Y

Fig. 2 is a corresponding section` throu h the exterior barrel or casing ofthe pencll; Q Fig. 3 is a detached perspective view` of an inner split tubular member employed for' locking the'several 'parts of the pencil in assembled relation and which in the final assembly lies closely within the outer barrel or` casingr and' becomes latched thereto;

Fi 4 is a detached perspective view of a. poet clip havinga novel relation to the ncil .and which is securely connected therewith withoutriveting; l n

Fig.- 5 is adetached perspective view of a filler plug and stop to lie within the inner the' manner ofassembling the interior vshell f. or casing of thel pencil and is end of the tip section of the outer barrel or caslng;

Y Fig. 6 is a longitudinal section through a hexagonal guiding ytube forming a part of thelnterior mechanism and which `-prevents rotation of the lead propelling and repelling devices, while permitting longitudinal movement thereof;

' Fig. 7 is a side elevation, partly 4in Sec tion, ofthe inner rotary tubular member from `which the lead actuating devices are operated and which may be utilized as a chamber for holding-reserve leads; Figs. 8 and 9 show in juxtaposed relation thejseveral parts of the lead holdin vand actuating mechanism finally dis ose 'cenl trally `within the pencilr and w ichl parts correspond .withl like features shown in my aforesaid Letters Patent No. 1,141,600. jy

Fig. 10 is a side elevation, partlyinsection and partly broken away, of the yrear portion of the pencil and is illustrativeof ortions ofthe pencil a'nd'introducing them 1nto or removing them from the outer barrel or casing;

.'Fig. 11 isran enlarged transverse sectionthrough the pencil taken on the dotted line 11e-11 of Fig. 1,f`a1 1d,

Y Fig.' 12 is a corres onding section throughH ythe same taken on, t edotted line 12-12 of The pencilcomprises four mam tubular members 10, .11', 12 and 13, respectively, the member-11 being'capablef1 of rotation and the other members 'being stationary.

lThefmember 10 constitutes the exterigr pre erably in one integral tube tapered at its forward end to form ya tip-section or member 14 through the `forward* end of which the lead 15 is projected, when desired, for writing purposes. The `member 10 has in its -outer or rear end portion, ank end recess 16 and a side aperture 17 whose be explained hereinafter.

The rear end of the casing member 10 is normally closed by a cap 18, which by means purposel will of a yoke 19, is swiveled to the tubular l member 11,' said member 11 having openings 20 inits opposite sides to receive the inwardly bent ends 21 of the side arms 22fof said yoke and permit saidv oke, lwith the cap 18,' when" said cap isfwith rawn rearwardly along-the yoke and from over the opemngs 20 (F ig. 10), to be turned downwardly to the position shown in Fig. 7 to expose vthe eraser 28 which plugs the rear end of the tubular member 11.

The tubular member 111s a plain cylindrical barrel having the openings 20 near its rear end and at its front end being secured in an annular recess 24 formed on the rear end of a nut 25 which contains 'a spirally threaded hole 26 in line with the longitudinal center of the tube 11 and has a hollow central portion 27 constituting a recess to freely receive the rear end of the tubular member 12, as shown in Fig. 1. The nut 25 has rounded exterior forward edges and in rear thereof is formed with an annular groove 28. The spirally threaded hole y26 in the nut 25 cooperates with the longitudinally movable spira-l rod 29, as hereinafter described, and the forward end of the nut 25 is within and interlocked at the groove 28 with the tubular member 18, as hereinafter explained and as shown in Fig. 1. In the assembly of the parts the nut 25 becomesginterlocked with the tubular member 18 but vis capable of rotary movement with the tubular member 11 with which it is rigidly connected, the tubularV member 18 remaining stationary with the outer casing 10.

The tubular member 11 isv therefore, as a separate member, rotatable within the outer shell or casing 10 and carries the nut 25, cap 18 and eraser 28, as shown in Fig. 10. The tubular member 11 forms within it a chamber for reserve leads and said chamber accessible when the eraser 28 is withdrawn yfrom the tube and closed when said eraser f is returned to position.

The cap 18 is of ornamental character and provides a chamber for the outer portion of the eraser 28 and outer end of the tube 11, which, as shown in Fig. 1, projects rearwardly beyond' the adjacent end of the casing 10. The arms 22 of the yoke 19 are connected within the cap 18 by a disk 80, and the cap is slidable on said arms and disk and prevented from being withdrawn entirely from off the same'by indented lugs81 in the sides yof the cap and which act as stops against the disk when the cap has been withdrawn to its full outer position, as shown in Fig. 10. When the cap 18 is in its forward position over the eraser 28 and rear end of the tube 11, its forward' edges abut against the rear edges of the casing 10, the sides of the cap then forming a continuation ofthe sides of the casing 10, as shown in Fig. 1. When the cap 18 is in the position shown in'Fig. 1, it will be utilized as a key for rotating the tube 11, and at this time the indented lugs 81 will perform their second function, to wit: that of engaging the arms 22 and through said arms imparting the rotary movement of said cap to the tube 11-f0r actuating the screw 29 and parts associated therewith, said lugs 31 engaging diagonally opposite edges of said arms when the cap 18 is turned clockwise and the other diagonally opposite edges of said arms when the cap is turned counter-clockwise. The

vcap 18 and yoke 19, thus serve as means for turning the tube 11 in either direction and the cap 18 serves as a finish for the rea-r end of the pencil and also affords a chamber con cealing the eraser 28. The cap 18 is pulled outwardly and then turned downwardly (Fig. 7) when the eraser 28 is to be used or when ythe `eraser is to be detached for exposing the chamber for reserve leads in the tubey 11. j

The tubular member 12 is a plain hexagonal tube partly closed at its forward end to guide the lead 15 and at said end engaging the inner forwardly converging walls of the tip-section 14, while the rea-r end of said tubular member 12 is snugly, though freely, positionedwithinthe recess 27 of the nut yWithin the tubular member 12 is located the forward end of the screw 29, the lead clutch or holder 82, the propeller rod 88 and the spring 84, which as shown in Fig. 1,'is on the rod 88 and interposed between the holder 82 anda hexagonal head 85 on the forward end ofthe screw 29. lThe rear end of the rod 88 is screwed into the forward end of the head 85, and on the forward end of the rod 8811s a head 86 disposed within the holder 82 and` which engages the rear 'end of the lead 15. The holder 82 has von its rear end a hexagonal head 87 which at the proper time 4will engage the partly closed end of the tube 12 and arrest the holder against further forward movement through saidftube, this taking place when the lead 15 has become very short and it is desired to expel the same by the continued forward movement of they rod 88 and head 86 through the holder 82. The screw 29 has a direct longitudinal movement imparted to it on the rotation of the tube 11,l and nut 25, and rotary movement ofsaid screw is preventedby the engagement of its hexagonal head with the inner surfaces of theheXagonal tube 12.

The screw 29 havingthe head 85, the holder 82 having the head 87, the propeller rod 88 having the head 86 and the spring 84 are specifically shown and described as'to their assembly and mode of operation in' my aforesaid Patent No. 1,441,600, and hence it is believed further detailed description of these features is not required herein. The present invention is not limited to the use of the spring 84, and in lieu thereof I may em'- ploy the clutch Afeatures described.in my Letters Patent No. 1,454.186, and indicated by the numerals 88, 84 therein.

The tubular member 18 is anew feature of the pencil and it is of sheet metal and preferably in theform of a longitudinally split tube, the two parts of the tube, numbered 38, 39 respectively in Fig. 3, being joined,

together attheir forward ends by a disk or head'40 which contains a hexagonal hole 41 vents rotation of said tube butthrough the tube overcomes the tendency'of the screw 29 and head to rotate under the influence of` the nut 25.

The half-sections 38, 39 of the tubulary member 13 arerecessed close to the head 40, as lat 42, so that said sections may be opened outwardly from each other to a limitedextent, as illustrated in Fig. 3. The tube sec' 11) and 4hold said nut and the tube'll against longitudinal movement lwithout in-` terering with their rotary'movement. The

tube section 38 is formed near its outer orf rear end with an outwardly pressed lug 44, and this lug in the final assembly ofthe parts of the pencil, snaps Ainto the khole 17 Jformed in the outer casing 10, as shown in Fig. l, and thereby said tubular vme'mber`13 becomes latchcd to said casing 10. The tube section 38 extendsl rearwardly to the rear end of the casing 10 and except for the proy vision of the pocket clip shown inFig. 4,the tube section 39 would be of the same length as the tube section 38. At present the tube section 39 does not'extend to the' rear edge of the casing 10 and-the opposite rear edges of the tube section 38 are cut away, as at 45, so as to provide for the application of the pocket clip 46 to the pencil. f

, The Vclip 46 comprisesthe usual tongue 47 f and body member or clasp 48, and the body: member 48 is applied'to the tube 11 outwardly from the end of the tube-section 39, as shown in Fig. 10,`and in the final assembly-of the parts of the pencil said bodymember is pushed into the rear end of the outer tubular 'casing 10, or fromfthe tion shown in Fig. 10 to that illustrated in Fig.y 1, in which latter positionthe inner end portion of the tongue 47 extends outwardly through the recess 16 formed yin the rear edge of the casing 10 and the body member or "clasp 48 is concealed within the casing` 10. The clip 46thus, becomes connected with the pencil without riveting and'without the clasp 48 being exposed. The recess 16 receives the "transverse portionfof vthe tongue 47and thus prevents said tongue from interfering with the seating of the ca p `18vagainst the'rear edges of the casing 10.

In assembling the parts of the pencil, the

. tube 11 and nut 25secured thereto being 4considered a unit, the screw 29, lead holder posimaybe then slippedy upon the hexagonal tube 12, the hole 41 passing rearwardly over said tube, and closed uponthe nut 25 and tube 11, A this operation resulting in the lugs,

43 entering the annular groove 28 of the nut 25 and in the tube-sections 38, 39 closely embracing said nut and the tube 11 without interfering` with the subsequent rotation of said nut and tube 11. The conical filler piece 49 mayv thenvbe slipped upon the tube 12 and against the head 40 ofthe tubular member 13, and thereupon the parts thus far assembled may be introduced intothe outer tube 10 from the rear end thereof and -moved forwardly to, say, about the position indicated in Fig. 10, and thereupon the' clip 46 may be applied to the tube 11 and the arms 22 of the cap-yoke 19 may be sprung into engagement with t-he openings 2O of said tube 11, after which the) tubula'rmemberr 13 and its associated parts may be pushed fully into the casing 10 or until the filler piece 49 seats within the tip-section 14 and the forward edgel of the cap 18 seats against the rear edge of the casing 10. On arrivingl at casing 10 and said lug snaps into saidopen` ing and thereby the tubular member 13 becomes latched to the casing 10 and the several parts .becomepositioned The lead 15 maybe propelled, repxelled and linally expelled by therotation of the cap 18. When it is desired to usev the eraser 23 the cap 'will be pulledr rearwardly alongthe yoke-arms 22 (Fig. 10) and then turned vdownwardly (Fig. v7) 'to exposefthe eraser, and at this time Vthe eraser may be withdrawn to permit access to the `vchamberwithin the tube `11.

The construction of the various parts of the pencil so as to be capable of eicient operation, of vremaining in operative relation to one another even during rough handling of the pencil and of convenient assembly with the aid ofthe tubular member 13, arecasing having at its'forward end a tipsec-V tion, av rear rotary tube therein equipped with a spirally threaded nut and having an operating head at its rear end, a non-,rotary f forward guiding tubey associated with 'said nut, a spirally threaded non-rotary rod extending through said nut and into said guiding tube and -movable longitudinallyT- from said nut, a lead-clutch vin said guiding tube movable longitudinally therein from said rod, and a split tubular member having on its forward end a head through kwhich said guiding tube passes andr by means of which said tube is held against rotation, the side members of Said split tubular member embracing said rotary tube within said exterior casing and said member being interlocked with said nut and latched to ,said casing and stationary therewith.

2.,A lead pencil comprising an exterior casing having atA its forward end a tip-section, a rear rotary tube therein equipped with a spirally threaded nut and having an operating head at its rear end, saidnut having a recess in its forward end, a hexagonal guiding tube extending from said tip-'section into said recess of said nut, -a spirally threaded non-rotary rod extending through said nut and into said guiding tube and movable longitudinally from said nut,

a lead-clutch in and conforming to said hexagonal guiding tube and movable longitudinally therein from `said rod, and a tubularv member embracing said rotary tube and latched to said exterior casing` said tubular member being interlocked with said nut and having a head on its forwardend containing a hexagonal opening through which said hexagonal ktube extends vand by means of which said tube is held against rotation.

3. A lead pencil comprising an exterior casing having at its forward end a tip-section, a rear rotary tube therein equipped with a spirally threaded nut and having an operating head at its rear end. said nut having a recess in its forward end, a hexagonal guiding tube extending from said tip-section into said recess of said nut, a spirally threaded non-,rotary rod extending through said nut and into said guiding tube and movf able longitudinally from said nut, a leadclutch in and conforming to said hexagonal guiding tube and movable longitudinally therein from said rod, and a tubular member embracing said rotary tube and latched to said exterior casing, said tubular member.

being interlocked with said nut and having a head on its forward end containing a hexagonal opening through which -said hexagonal tube extends and by means of which said tube is held against rotation, and said tubular member being in the form ofl a split tube to close upon opposite sides of said rotary tube and having a lug on one-of its members to `snap into an opening in said outer casing. whereby said parts become latched together. n f

` 4. A lead pencil comprising an exterior casing having at-its forward end a tip-section, a rear rotary tube therein equipped with a` spirally threaded nut and having an operating head at its rear end, a non-rotary forward guiding tube associated with said nut, a spirally threaded non-rotary rod extending through said nut and into said guiding tube and movable longitudinally from.

rear end and which has an opening through whichnsaid guiding tube extends, and said split tubular member having its forward head seated aga-inst said filler-piece.

5. A lead pencil comprising an exterior casing having at its forwardend a tip-sed tion, a rear'rotary tube therein equipped witha spirally threaded nut and havin an oper-ating head at its rear end, said nut aving a recess in its forward end, a hexagonal guiding tube extendin from said ti -section into said recess o said nut and eing partly closed at its forward end, a spirally threaded rod extending.v through sald nut and movable longitudinally therefrom and having on its forward end a hexagonal head to guide within said hexagonal tube, a propellerl rod connected with and extendin forand having a head on its forward end to en` gage the lead and slidable within said member, said propeller rod being adapted when `the lead-holding member is arrested at the end of the hexagonal tube to continue in motion to expel the remaining piece of lead,l said spring then being compressed between the said hexagonal head and the lead-holding member, and a tubular member embrac-V ing said rotary tube and latched to said exterior casing, said tubular member being interlocked with said nut and having a head on its forward end containing a hexagonal opening through which said hexagonal tube extends and by means of rwhich said tube is held against rotation. l

6. A lead-pencil comprising an exterior casing having at its forward end a tip-,sec-y tion, a rear rotary tube therein having rigid with its forward end a spirally threaded nut formed with a circumferential groove, said tube having an operating head at its outer end, a non-rotary forward guiding-tubek asrotation, the side members of said split. tubular member embracing said rotary tube within said exterior casing and having depressed luge freely entered within the circumferential groove of said nut, and said tubular member being latclied at its rear end to the rear portion of said casing and stationary with said casing.

Signed at New York city, in the county of New York and State of New York, this 4th day of September, A. D. 1928.

ABRAHAM POLLAK. 

